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A collection of 17 posts

Let's Encrypt Certificate Renewals (TLS-SNI-01 Validation)

Let's Encrypt Certificate Renewals (TLS-SNI-01 Validation)

If you've set up Let's Encrypt certificates in the past, you would've most likely received emails indicating that action is required in order to prevent upcoming renewals from breaking (starting Feb. 13, 2019). Depending on your deployment, you can test against their staging environment

Cloud (VPS) Hosting Compared

Cloud (VPS) Hosting Compared

Over these past couple years, I've tried a fair number of cloud server providers to get a better idea how feasible each one of them are. To be clear, we're going to cover hosting for more general use cases opposed to solutions that are more geared

SSH Key Setup

Premise Sometimes connections requires a password or a really long command, so by adding your public key to the server you can just do something like: ssh user@123.45.67.89 Then you would be connected with no password prompt. Notes You may have already generated a public key,

How to Delete Partitions from Storage Media

How to Delete Partitions from Storage Media

When it comes to trying new Linux distros, I find myself deleting hidden partitions from time to time. This is also useful when software tools set up your USB flash drive or SD card and you end up seeing only a portion of total available space. Be sure to backup

Resolve DNS Errors on Google Chrome

Ever try loading a webpage and get greeted with a DNS_PROBE_FINISHED_NXDOMAIN or ERR_NAME_NOT_RESOLVED? This is actually a DNS [https://en.wikipedia.org/wiki/Domain_Name_System] issue that could be resolved on the OS side. On Windows, find and run services.msc then look

WordPress Update Failed due to Permissions

Seeing a recent update that was released for WordPress (4.2.2), I decided it was a good idea to get caught up with the version as it patched the XSS vulnerability [https://blog.sucuri.net/2015/04/security-advisory-xss-vulnerability-affecting-multiple-wordpress-plugins.html] that was discovered a few weeks prior. At a first

Set up BitTorrent Sync on your Linux Server

With the general availability of BitTorrent Sync 2.0 [http://blog.getsync.com/2015/03/03/sync-2-0-skip-the-cloud-share-direct/] recently announced, we see introduction of many Pro features for their service. I played around with the platform when it was still in the early stages and has it come a long way.

High CPU/RAM Usage by "update-apt-xapi"

So I've been getting warnings from my host lately regarding high CPU and memory use on my VPSs. From what I could tell, the offending process was update-apt-xapi - it would be consuming all the CPU time for hours and use quite a bit of RAM. Some research

Securing Your Machines from the "Shellshock" Bug

Dubbed "Shellshock", this exploit can allow attackers to inject code through the Bash utility. The affected software being common in Unix based systems can potentially put both Mac and Linux users at risk - not to mention the vast number of servers which run some sort of Linux

Year in Review for 2013

There's no doubt time flies, and with a blink of an eye 2013 is approaching its last few days. It felt like yesterday I was still attending classes, but now I'm currently working as an associate developer for a relatively new company specializing in mobile applications.

Quick Tip: Adjust sudo Password Timeout Duration

Find yourself entering your password quite often when running a "sudo" command? This is because it only lasts for 15 minutes by default, and can be a bit of nuisance if you're entering commands that are spaced apart from time to time. You can actually adjust

Install Transmission on a Remote Machine (with Web UI)

This is another quick project that I felt well suited to be deployed on a Raspberry Pi or any other Linux server. Hook up some external storage to the Pi and you have essentially a NAS powerhouse with decent BitTorrent capability. Transmission is fairly lightweight and has a web UI

Quick Fix: Brightness Control on Laptop for Linux (Mint, Ubuntu, etc.)

Here's a tip that might help some people out. So I've installed various Linux distributions on my Acer TimelineX (3820T series) and usually find much of the hardware working out of the box without additional tweaks. One thing that I noticed which wasn't always

Project Highlight: Honeypot Deployment (Part 2)

Project Highlight: Honeypot Deployment (Part 1)

Is your Apache Server under Attack?

The Apache web server is a fairly common service that powers many websites today, and it's been under attack for about a bit over a month now. These attacks differ in terms of complexity, strength, and covertness and are not visible without the use of special forensics tools.

Get Rid of Those Ads in uTorrent

Acquisitions don’t seem to find “happy” endings these days, like apossible sale of Linksys [http://www.bloomberg.com/news/2012-12-17/cisco-said-to-hire-barclays-to-sell-linksys-division.html] where Cisco picked up in 2003 (looks like Belkin is the new "owner" now). On a smaller scale where BitTorrent bought uTorrent and a recent